Were you wearing at least a belt with the map, a langou (other than solely the woven britches) or an equipment piece in the bottomwear slot? Any of those combinations should allow you to progress, at least from what I just verified in the latest dev version.
Are you getting a message that says "Gotta put on something around my loins, at least." or is no message showing up at all? If there is no message, and you're on PC, open up the console with SHIFT + O, input "_dismiss_pause = True" and then input "exit" to close out of the console (both without quotation marks).